sigma 17-50mm f2.8, all over the place, could not focus correctly under daylight but worked ok indoors even under very low light (hows that for a change?)
no microadjustment would make it perfect in all conditions, fantastic lens via LV focus, best sigma zoom lens i ever seen but donkey with normal focus.
back to adorama with this thing but sad to do so as it worked without problems on k20d and i really though it will be my favorite lens for years to come
pentax * 16-50 f2.8 two copies same issue, back focus under daylight.
-6 adjustment fixed daylight problem but what is really odd and i wish someone could explain this to me why indoors it focus fine even without microadjustment ?!?! first copy was returned to adorama as it had some mark or dust on the inside, but focus wise both performed idetically and both worked like sigma just fine on k20d so no buts there is something off with K5 AF.
was pulling my hair out thinking that if not all of my lenses i would be thinking about leaving pentax camp but I don't give up easly and i been with pentax for too long to just walk away (mostly i would just hate to use canon or nikon like every Tom, Harry and theirs dogs out there) so then i figured lets try some other lenses, to my surprise they ALL worked fine, even FA50 1.4 wide open would be focus spot on, i'm yet to test outdoors under clear sky as i run out of time today for the final test but it is looking good.
so if not for 17-50 and 16-50 lenses I would never even know there was a problem with K5 focusing system and there is no question for me that there is a problem.
i'm sort of happy now since microadjustment fixed my 16-50 and it is WR so i guess i'm ok with keeping it but if there was no problem with K5 i would have sigma for less money and a fair bit lighter.
point of my post? a freindly reminder that maybe before you knock people for whining too much or before you claim it must be "user error" please consider that K5 can act very differenlly with some lenses and just because you don't see the problem doesn't mean there is no problem.
this also works both ways, just because someone claims to have no problems doesn't mean they lieing and are blinded pentax fanboys, they might have combination of lenses that just don't demonstrates the problem so don't lock horns over things like this guys.